USPC Class Details

Description: 91 motors: expansible chamber type / 91 motors: expansible chamber type/(170r) relatively movable working members with one having motive fluid controlled by, movably interconnected with or moved by another (189r) position of one working member controls motive fluid for another (190) changeable to plural self-controlled working members

Hierarchy/Derived subclasses

91 / 170r

-> 189r

-> 190

uspto searches

Patent Apps in 91/190

Granted Patents in 91/190

Use the links above or do an advanced search in ppubs for:
(91/190.ccls.)

This will show what classes derive from the input. Ex: entering 43/42.24 shows the derived classes and the search that can be used to find patents or patent applications in those subclasses.

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